| 1 | Our quartz technique is well known in the world, and we believe our watches are of fine quality. | |
| 2 | To this class of substance belong mica, porcelain, quartz, glass, wood, etc. | |
| 3 | In normal coal samples, quartz and other minerals are found only in trace amounts. | |
| 4 | A quartz wristwatch, by comparison, is sensitive to about a millionth of a degree, or 10-6 degrees. | |
| 5 | The company's product line includes a range of quartz crystal microbalance monitors, controllers, and accessories. |